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Add documentation for %Z quirk #1051

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May 7, 2023
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Add documentation for %Z quirk #1051

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8 changes: 7 additions & 1 deletion src/format/strftime.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,7 @@ The following specifiers are available both to formatting and parsing.
| `%r` | `12:34:60 AM` | Hour-minute-second format in 12-hour clocks. Same as `%I:%M:%S %p`. |
| | | |
| | | **TIME ZONE SPECIFIERS:** |
| `%Z` | `ACST` | Local time zone name. Skips all non-whitespace characters during parsing. [^8] |
| `%Z` | `ACST` | Local time zone name. Skips all non-whitespace characters during parsing. Identical to `%:z` when formatting. [^8] |
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Maybe this could say something like:
"Time zone name. Depends on the Display implementation of the type implementing TimeZone. Skips all non-whitespace characters during parsing.

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Yeah, that would probably be an improvement.

| `%z` | `+0930` | Offset from the local time to UTC (with UTC being `+0000`). |
| `%:z` | `+09:30` | Same as `%z` but with a colon. |
|`%::z`|`+09:30:00`| Offset from the local time to UTC with seconds. |
Expand Down Expand Up @@ -164,6 +164,12 @@ Notes:
Note that they can read nothing if the fractional part is zero.

[^8]: `%Z`:
Since `chrono` is not aware of timezones beyond their offsets, this specifier
**only prints the offset** when used for formatting. The timezone abbreviation
will NOT be printed. See [this issue](https://github.com/chronotope/chrono/issues/960)
for more information.
<br>
<br>
Offset will not be populated from the parsed data, nor will it be validated.
Timezone is completely ignored. Similar to the glibc `strptime` treatment of
this format code.
Expand Down